PACHYDERMES. 
103 
The value of ivory is well known ; it is supplied 
principally from the tusks of the Elephant ; and 
to obtain this small but valuable portion of these 
immense creatures, mail}' personal risks are in- 
curred, and great and indiscriminate slaughter 
is often made. The teeth of the Hippopotamus 
yield a closer grained and harder material than 
the tusks of the Elephant, and are preferred 
by dentists for artificial teeth, and for subjects 
which require great delicacy of carving. An 
immense quantity of ivory reaches China, and 
is again exported, carved into many beautiful and 
ingenious articles. We may also just mention 
the very useful, though common articles procured 
from other animals of the Pcichydermes , — hog’s 
lard and pig’s bristles ; nor should we neglect the 
beautiful and lustrous article, pig’s hair, sometimes 
difficult to be procured, but always in high request 
by the angler. 
We shall now examine the members of the dif- 
ferent genera separately, and commence with 
